B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/83
B60T 11/20 (2006.01) B60T 11/224 (2006.01)
Patent
CA 1277354
FAST FILL VALVING MECHANISM FOR A MASTER CYLINDER ABSTRACT OF THE DISCLOSURE The master cylinder (10) comprises a housing (12) having a longitudinal bore (14), an end (24) en- closed by a bearing member (18) which retains a sleeve member (20) within the bore (14), a reservoir (70) mounted on the housing (12) and a pair of pistons (30, 40) slidably received within the bore (14), one piston (30) extending through the end (24) of the sleeve member (20). The one piston (30) has a reduced diameter end (32) which provides seating for a fast fill valving mech- anism (110). The fast fill valving mechanism (ll0) com- prises a fast fill seal (120) having a flexible arm (122) engaging an interior surface of the sleeve member (20) and the sleeve member (20) having longitudinal grooves (22) adjacent the arm (122), a fast fill spring member (140) trapped between the fast fill seal (120) and a land member (130), the land member (l30) having pockets (132) covered by the fast fill spring member (140) and the pockets (132) communicating with passages (133) in the land member (l30). The land member (130) engages a flex- ible seal (90) engaging an interior surface (23) of the sleeve member (20). Displacement of the one piston (30) within the bore (14) creates an increasing pressure which will, at a predetermined higher pressure, cause the fast fill spring member (140) to bow into the pockets (132) and permit fluid passage therearound and through the land member (130) to an auxiliary chamber (170) defined by the land member (130), flexible seal (90), and the sleeve member (20).
538760
Alliedsignal Inc.
Macrae & Co.
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